Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity

The objectives of this paper were to determine the efficiency of physicochemically modified soils with a surfactant in the sorption of pesticides, the stability against washing of the pesticides sorbed, and the effective sorption capacity of surfactant adsorbed by soils as a function of pesticide hy...

ver descrição completa

Detalhes bibliográficos
Autores: Rodríguez-Cruz, M. [0000-0001-6748-3391], Sánchez-Martín, M. [0000-0002-8304-1232], Andrades, M. [0000-0003-4136-8656], Sánchez-Camazano, M.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:España
Recursos:Universidad de La Rioja (UR)
Repositorio:RIUR. Repositorio Institucional de la Universidad de La Rioja
OAI Identifier:oai:portal.dialnet.es:doc/5bbc688bb750603269e80ad1
Acesso em linha:https://investigacion.unirioja.es/documentos/5bbc688bb750603269e80ad1
Access Level:acceso abierto
Palavra-chave:Cationic surfactant
Desorption
Modified soils
Pesticides
Sorption
Water pollution
id ES_3db8bd01b706f4caa8441aef2a620caf
oai_identifier_str oai:portal.dialnet.es:doc/5bbc688bb750603269e80ad1
network_acronym_str ES
network_name_str España
repository_id_str
spelling Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicityRodríguez-Cruz, M. [0000-0001-6748-3391]Sánchez-Martín, M. [0000-0002-8304-1232]Andrades, M. [0000-0003-4136-8656]Sánchez-Camazano, M.Cationic surfactantDesorptionModified soilsPesticidesSorptionWater pollutionThe objectives of this paper were to determine the efficiency of physicochemically modified soils with a surfactant in the sorption of pesticides, the stability against washing of the pesticides sorbed, and the effective sorption capacity of surfactant adsorbed by soils as a function of pesticide hydrophobicity and soil characteristics. Five soils of different characteristics and five pesticides (penconazole, linuron, alachlor, atrazine and metalaxyl) with different Kow values were selected and octadecyltrimethylammonium bromide (ODTMA) was chosen as model of cationic surfactants. Sorption-desorption isotherms were obtained and constants Kf and Kfd for natural soils (from Freundlich equation) and K and Kd for ODTMA-soils (from linear equation) were determined. Sorption on ODTMA-soils was higher than on natural soils. K increased 27-165 times for penconazole, 22-77 times for linuron, 7-14 times for alachlor, 9-23 times for atrazine, and 21-333 times for metalaxyl in relation to Kf. Sorption coefficients normalized to 100% of total organic matter (TOM) from organo soils K OM (K 100/%TOM), were always higher than those from natural soils Kf OM (Kf 100/%OM), indicating that the organic matter (OM) derived from the ODTMA (OM ODTMA ) had a greater sorption capacity than the OM of the natural soil. K OM values were also higher than the Kow (octanol/water distribution coefficient) value for each pesticide. The similarity of the high K OM values for the sorption of each pesticide by the five soils and the linearity of isotherms point to a partitioning of the pesticides between surfactant and water. The use in this work of different soils and various pesticides, unusual in this type of investigation, allowed us to obtain equations to know the sorbed amount of a given pesticide by the surfactant-modified soils as a function of the OM content derived from the cation and the Kow of the pesticide. The results obtained are of interest when it becomes necessary to increase the sorption capacity of soils with low OM contents with a view to delaying pesticide mobility in soils from pollution point sources (high concentration in small area), and preventing the pollution of waters. Copyright © Taylor & Francis Group, LLC.2006info:eu-repo/semantics/articleSubtype: Articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://investigacion.unirioja.es/documentos/5bbc688bb750603269e80ad1reponame:RIUR. Repositorio Institucional de la Universidad de La Riojainstname:Universidad de La Rioja (UR)Inglésinfo:eu-repo/semantics/altIdentifier/doi/10.1080/15320380600751769info:eu-repo/semantics/altIdentifier/wos/WOS:000238733400006info:eu-repo/semantics/altIdentifier/pissn/1532-0383Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity, 2006, vol. 15, núm. 4, pág. 401-415info:eu-repo/semantics/openAccessoai:portal.dialnet.es:doc/5bbc688bb750603269e80ad12026-06-14T12:47:17Z
dc.title.none.fl_str_mv Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
title Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
spellingShingle Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
Rodríguez-Cruz, M. [0000-0001-6748-3391]
Cationic surfactant
Desorption
Modified soils
Pesticides
Sorption
Water pollution
title_short Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
title_full Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
title_fullStr Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
title_full_unstemmed Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
title_sort Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity
dc.creator.none.fl_str_mv Rodríguez-Cruz, M. [0000-0001-6748-3391]
Sánchez-Martín, M. [0000-0002-8304-1232]
Andrades, M. [0000-0003-4136-8656]
Sánchez-Camazano, M.
author Rodríguez-Cruz, M. [0000-0001-6748-3391]
author_facet Rodríguez-Cruz, M. [0000-0001-6748-3391]
Sánchez-Martín, M. [0000-0002-8304-1232]
Andrades, M. [0000-0003-4136-8656]
Sánchez-Camazano, M.
author_role author
author2 Sánchez-Martín, M. [0000-0002-8304-1232]
Andrades, M. [0000-0003-4136-8656]
Sánchez-Camazano, M.
author2_role author
author
author
dc.subject.none.fl_str_mv Cationic surfactant
Desorption
Modified soils
Pesticides
Sorption
Water pollution
topic Cationic surfactant
Desorption
Modified soils
Pesticides
Sorption
Water pollution
description The objectives of this paper were to determine the efficiency of physicochemically modified soils with a surfactant in the sorption of pesticides, the stability against washing of the pesticides sorbed, and the effective sorption capacity of surfactant adsorbed by soils as a function of pesticide hydrophobicity and soil characteristics. Five soils of different characteristics and five pesticides (penconazole, linuron, alachlor, atrazine and metalaxyl) with different Kow values were selected and octadecyltrimethylammonium bromide (ODTMA) was chosen as model of cationic surfactants. Sorption-desorption isotherms were obtained and constants Kf and Kfd for natural soils (from Freundlich equation) and K and Kd for ODTMA-soils (from linear equation) were determined. Sorption on ODTMA-soils was higher than on natural soils. K increased 27-165 times for penconazole, 22-77 times for linuron, 7-14 times for alachlor, 9-23 times for atrazine, and 21-333 times for metalaxyl in relation to Kf. Sorption coefficients normalized to 100% of total organic matter (TOM) from organo soils K OM (K 100/%TOM), were always higher than those from natural soils Kf OM (Kf 100/%OM), indicating that the organic matter (OM) derived from the ODTMA (OM ODTMA ) had a greater sorption capacity than the OM of the natural soil. K OM values were also higher than the Kow (octanol/water distribution coefficient) value for each pesticide. The similarity of the high K OM values for the sorption of each pesticide by the five soils and the linearity of isotherms point to a partitioning of the pesticides between surfactant and water. The use in this work of different soils and various pesticides, unusual in this type of investigation, allowed us to obtain equations to know the sorbed amount of a given pesticide by the surfactant-modified soils as a function of the OM content derived from the cation and the Kow of the pesticide. The results obtained are of interest when it becomes necessary to increase the sorption capacity of soils with low OM contents with a view to delaying pesticide mobility in soils from pollution point sources (high concentration in small area), and preventing the pollution of waters. Copyright © Taylor & Francis Group, LLC.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
Subtype: Article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://investigacion.unirioja.es/documentos/5bbc688bb750603269e80ad1
url https://investigacion.unirioja.es/documentos/5bbc688bb750603269e80ad1
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/15320380600751769
info:eu-repo/semantics/altIdentifier/wos/WOS:000238733400006
info:eu-repo/semantics/altIdentifier/pissn/1532-0383
Comparison of pesticide sorption by physicochemically modified soils with natural soils as a function of soil properties and pesticide hydrophobicity, 2006, vol. 15, núm. 4, pág. 401-415
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RIUR. Repositorio Institucional de la Universidad de La Rioja
instname:Universidad de La Rioja (UR)
instname_str Universidad de La Rioja (UR)
reponame_str RIUR. Repositorio Institucional de la Universidad de La Rioja
collection RIUR. Repositorio Institucional de la Universidad de La Rioja
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406465230372864
score 15,300719

Registos relacionados